Patents by Inventor Yasuki Tanaka

Yasuki Tanaka has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9382089
    Abstract: A paper transporting device includes a driving roller member, a driven roller member, a first guiding member and a second guiding member. The driving roller member is rotated. The driven roller member is rotated in contact with the driving roller member. The first guiding member is disposed on a driving roller member side, and guides a paper to a contact portion in which the driving roller member and the driven roller member are in contact with each other. The second guiding member is disposed on a driven roller member side, and guides the paper to the contact portion. The second guiding member partially protrudes inward in a radial direction of the driving roller member from an outer peripheral surface of the driving roller member at a downstream side in a paper transporting direction of the contact portion.
    Type: Grant
    Filed: September 3, 2010
    Date of Patent: July 5, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Yasuki Tanaka, Yukihiro Ichiki, Motoyuki Yagi, Tahei Nakamura
  • Publication number: 20140314460
    Abstract: A sheet pressing device includes plurality of pressing members and a support member. The plurality of pressing members is provided on a downstream side in a discharging direction of fixing unit which carries out a fixing treatment over a sheet having an unfixed image transferred thereonto along the discharging direction. The plurality of pressing members presses both ends of the sheet in a direction along a surface of the sheet carried out the fixing treatment by the fixing unit and in a direction crossing the discharging direction. The support member supports the plurality of pressing members movably in such a direction as to approach or separate from the sheet when the sheet passes through the sheet pressing device.
    Type: Application
    Filed: June 30, 2014
    Publication date: October 23, 2014
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yukihiro ICHIKI, Yasuki TANAKA, Motoyuki YAGI
  • Patent number: 8862046
    Abstract: A sheet pressing device includes plurality of pressing members and a support member. The plurality of pressing members is provided on a downstream side in a discharging direction of fixing unit which carries out a fixing treatment over a sheet having an unfixed image transferred thereonto along the discharging direction. The plurality of pressing members presses both ends of the sheet in a direction along a surface of the sheet carried out the fixing treatment by the fixing unit and in a direction crossing the discharging direction. The support member supports the plurality of pressing members movably in such a direction as to approach or separate from the sheet when the sheet passes through the sheet pressing device.
    Type: Grant
    Filed: September 2, 2010
    Date of Patent: October 14, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yukihiro Ichiki, Yasuki Tanaka, Motoyuki Yagi
  • Patent number: 8523178
    Abstract: A discharge mechanism includes a rotating shaft that is rotatable, a plurality of roll portions provided around the rotating shaft, an opposing member provided above the roll portions so as to oppose the roll portions, the opposing member holding and conveying a material to be conveyed, in cooperation with the roll portions so that the material to be conveyed is discharged onto a discharge section, and a protrusion formed on an outer periphery of the rotating shaft, the protrusion not protruding beyond the outer diameter of the roll portions.
    Type: Grant
    Filed: December 11, 2009
    Date of Patent: September 3, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Yasuki Tanaka
  • Patent number: 8442421
    Abstract: A conveying path switching structure includes a cover unit and a conveying path switch unit. The cover unit is attached to an image forming apparatus main body so as to be movable between a close state and an open state in which a fixing unit is exposed. The conveying path switch unit is rotatably attached to the cover unit and that switches a conveying path of a record medium between a discharge conveying path and a double-side conveying path. The discharge conveying path is a path where the record medium is conveyed from a discharge part of the fixing unit to a discharge unit that discharges the record medium to outside of the image forming apparatus main body in a close state. The double-side conveying path is a path where the record medium is conveyed again to an image forming unit.
    Type: Grant
    Filed: January 13, 2010
    Date of Patent: May 14, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yukihiro Ichiki, Yasuki Tanaka, Satoshi Isahai
  • Patent number: 8380108
    Abstract: A fixing device includes a main body mounted on an image forming apparatus body; a fixing member that is included in the main body and that fixes an image to a recording medium; a pair of conveying rolls that is supported by the main body and that conveys the recording medium to which an image is fixed by the fixing member, the pair of conveying rolls comprising a driven roll and a driving roll disposed under the driven roll; and an exterior portion that is formed in the main body, disposed under the driving roll, forms an exterior face of the main body, and also forms an exterior face of the image forming apparatus body while the main body is mounted on the image forming apparatus body.
    Type: Grant
    Filed: August 30, 2010
    Date of Patent: February 19, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Satoshi Isahai, Yasuki Tanaka, Yukihiro Ichiki, Yasuo Suzuki
  • Patent number: 8351834
    Abstract: A conveying device includes: a rotating roll; a conveying belt that rotates, nipping a conveyed member between the conveying belt and the rotating roll; and a pressing member that is disposed at the inner periphery of the conveying belt and pressing the conveying belt towards the rotating roll. The pressing member includes an opposing face formed with a pressure point where the pressing force of the conveying belt towards the rotating roll is greatest, and an inclined face that is formed at the belt rotation direction upstream side relative to the pressure point. The inclined face inclines at an angle relative to a parallel line such that the inclined face separates away from the rotating roll, and the parallel line being parallel to a tangent to the rotating roll outer peripheral surface and passing through the pressure point.
    Type: Grant
    Filed: August 24, 2010
    Date of Patent: January 8, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Motoyuki Yagi, Yasuki Tanaka, Yukihiro Ichiki
  • Patent number: 8346147
    Abstract: A fixing unit includes a heating roll, an endless belt and a pressing body having a hard pressing member and a soft pressing member. The hard pressing member is placed on a downstream of a passage direction of a record medium in a press contact part and forms higher hardness than an elastic layer of the heating roll. The soft pressing member is placed on an upstream of the passage direction from the hard pressing member, and forms lower hardness than the elastic layer. The press contact part is formed in a state in which a first press contact portion of the hard pressing member is longer than a second press contact portion of the soft pressing member. The hard pressing member has an end part opposed to the heating roll on the upstream. The end part has a face approaching the heating roll from the upstream to the downstream.
    Type: Grant
    Filed: February 17, 2010
    Date of Patent: January 1, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Motoyuki Yagi, Yasuki Tanaka, Yoshiyasu Tanioka
  • Patent number: 8185029
    Abstract: A fixing device comprises: a pair of fixing rotors, at least one of which has a heating source and both of which are rotated in pressure contact with each other; and a click-shaped peeling member provided on a downstream side of the fixing rotor with respect to a transporting direction of a recording medium and disposed in contact with a surface of the fixing rotor, wherein a tip portion of the click-shaped peeling member which is to come in contact with the fixing rotor is elastically deformed in conformity to a shape of a surface of the fixing rotor when coming in contact with the fixing rotor.
    Type: Grant
    Filed: December 11, 2009
    Date of Patent: May 22, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Satoshi Isahai, Yasuki Tanaka, Yukihiro Ichiki
  • Publication number: 20110236085
    Abstract: A conveying device includes: a rotating roll; a conveying belt that rotates, nipping a conveyed member between the conveying belt and the rotating roll; and a pressing member that is disposed at the inner periphery of the conveying belt and pressing the conveying belt towards the rotating roll. The pressing member includes an opposing face formed with a pressure point where the pressing force of the conveying belt towards the rotating roll is greatest, and an inclined face that is formed at the belt rotation direction upstream side relative to the pressure point. The inclined face inclines at an angle relative to a parallel line such that the inclined face separates away from the rotating roll, and the parallel line being parallel to a tangent to the rotating roll outer peripheral surface and passing through the pressure point.
    Type: Application
    Filed: August 24, 2010
    Publication date: September 29, 2011
    Applicant: Fuji Xerox Co., Ltd.
    Inventors: Motoyuki YAGI, Yasuki TANAKA, Yukihiro ICHIKI
  • Publication number: 20110236042
    Abstract: An image forming apparatus includes: an image forming unit that forms an image on recording paper; a paper feeding unit that feeds the recording paper to the image forming unit; an opening/closing door that is provided to be opened/closed by an operator; a paper conveyance path through which the recording paper is conveyed from the paper feeding unit through the image forming unit to a paper outlet, the paper conveyance path including a maintenance feasible conveyance path and a maintenance infeasible conveyance path that does not allows the operator to maintain even if the opening/closing door is opened; and a residual paper detecting unit that detects residual paper remaining on the maintenance infeasible conveyance path. New recording paper is fed to the paper conveyance path when the residual paper detecting unit has detected the residual paper after opening and closing the opening/closing door.
    Type: Application
    Filed: August 30, 2010
    Publication date: September 29, 2011
    Applicant: FUJI XEROX CO., LTD.
    Inventor: Yasuki TANAKA
  • Publication number: 20110236068
    Abstract: A fixing device includes a main body mounted on an image forming apparatus body; a fixing member that is included in the main body and that fixes an image to a recording medium; a pair of conveying rolls that is supported by the main body and that conveys the recording medium to which an image is fixed by the fixing member, the pair of conveying rolls comprising a driven roll and a driving roll disposed under the driven roll; and an exterior portion that is formed in the main body, disposed under the driving roll, forms an exterior face of the main body, and also forms an exterior face of the image forming apparatus body while the main body is mounted on the image forming apparatus body.
    Type: Application
    Filed: August 30, 2010
    Publication date: September 29, 2011
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Satoshi ISAHAI, Yasuki TANAKA, Yukihiro ICHIKI, Yasuo SUZUKI
  • Publication number: 20110222944
    Abstract: A paper transporting device includes a driving roller member, a driven roller member, a first guiding member and a second guiding member. The driving roller member is rotated. The driven roller member is rotated in contact with the driving roller member. The first guiding member is disposed on a driving roller member side, and guides a paper to a contact portion in which the driving roller member and the driven roller member are in contact with each other. The second guiding member is disposed on a driven roller member side, and guides the paper to the contact portion. The second guiding member partially protrudes inward in a radial direction of the driving roller member from an outer peripheral surface of the driving roller member at a downstream side in a paper transporting direction of the contact portion.
    Type: Application
    Filed: September 3, 2010
    Publication date: September 15, 2011
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yasuki TANAKA, Yukihiro ICHIKI, Motoyuki YAGI, Tahei NAKAMURA
  • Publication number: 20110211873
    Abstract: A sheet pressing device includes plurality of pressing members and a support member. The plurality of pressing members is provided on a downstream side in a discharging direction of fixing unit which carries out a fixing treatment over a sheet having an unfixed image transferred thereonto along the discharging direction. The plurality of pressing members presses both ends of the sheet in a direction along a surface of the sheet carried out the fixing treatment by the fixing unit and in a direction crossing the discharging direction. The support member supports the plurality of pressing members movably in such a direction as to approach or separate from the sheet when the sheet passes through the sheet pressing device.
    Type: Application
    Filed: September 2, 2010
    Publication date: September 1, 2011
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yukihiro ICHIKI, Yasuki TANAKA, Motoyuki YAGI
  • Patent number: 7962084
    Abstract: A fixing device comprises a heating roll; an endless belt; and a pressurizing member that forms a pressure contact portion for pushing the endless belt against an outer peripheral surface part of the heating roll from an inner peripheral surface side of the pressurizing member so that a recording medium holding an unfixed image passes between the pressure contact portion and the heating roll, wherein the pressurizing member includes: a hard pressurizing member and a soft pressurizing member the hard pressurizing member, and the soft pressurizing member are disposed in a state in which a clearance is present between the hard pressurizing member and the soft pressurizing member in a specific region part so that at least a specific recording medium passes in a fixing region of the pressure contact portion in the rotating axis direction of the heating roll.
    Type: Grant
    Filed: December 3, 2009
    Date of Patent: June 14, 2011
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yasuki Tanaka, Yukihiro Ichiki, Satoshi Isahai, Masami Ishida, Masahiro Ishino, Hitoshi Nanba
  • Publication number: 20100329761
    Abstract: A conveying path switching structure includes a cover unit and a conveying path switch unit. The cover unit is attached to an image forming apparatus main body so as to be movable between a close state and an open state in which a fixing unit is exposed. The conveying path switch unit is rotatably attached to the cover unit and that switches a conveying path of a record medium between a discharge conveying path and a double-side conveying path. The discharge conveying path is a path where the record medium is conveyed from a discharge part of the fixing unit to a discharge unit that discharges the record medium to outside of the image forming apparatus main body in a close state. The double-side conveying path is a path where the record medium is conveyed again to an image forming unit.
    Type: Application
    Filed: January 13, 2010
    Publication date: December 30, 2010
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yukihiro ICHIKI, Yasuki TANAKA, Satoshi ISAHAI
  • Publication number: 20100284715
    Abstract: A fixing unit includes a heating roll, an endless belt and a pressing body having a hard pressing member and a soft pressing member. The hard pressing member is placed on a downstream of a passage direction of a record medium in a press contact part and forms higher hardness than an elastic layer of the heating roll. The soft pressing member is placed on an upstream of the passage direction from the hard pressing member, and forms lower hardness than the elastic layer. The press contact part is formed in a state in which a first press contact portion of the hard pressing member is longer than a second press contact portion of the soft pressing member. The hard pressing member has an end part opposed to the heating roll on the upstream. The end part has a face approaching the heating roll from the upstream to the downstream.
    Type: Application
    Filed: February 17, 2010
    Publication date: November 11, 2010
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Motoyuki YAGI, Yasuki TANAKA, Yoshiyasu TANIOKA
  • Publication number: 20100247179
    Abstract: A fixing device comprises: a pair of fixing rotors, at least one of which has a heating source and both of which are rotated in pressure contact with each other; and a click-shaped peeling member provided on a downstream side of the fixing rotor with respect to a transporting direction of a recording medium and disposed in contact with a surface of the fixing rotor, wherein a tip portion of the click-shaped peeling member which is to come in contact with the fixing rotor is elastically deformed in conformity to a shape of a surface of the fixing rotor when coming in contact with the fixing rotor.
    Type: Application
    Filed: December 11, 2009
    Publication date: September 30, 2010
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Satoshi ISAHAI, Yasuki TANAKA, Yukihiro ICHIKI
  • Publication number: 20100247186
    Abstract: A fixing device comprises a heating roll; an endless belt; and a pressurizing member that forms a pressure contact portion for pushing the endless belt against an outer peripheral surface part of the heating roll from an inner peripheral surface side of the pressurizing member so that a recording medium holding an unfixed image passes between the pressure contact portion and the heating roll, wherein the pressurizing member includes: a hard pressurizing member and a soft pressurizing member the hard pressurizing member, and the soft pressurizing member are disposed in a state in which a clearance is present between the hard pressurizing member and the soft pressurizing member in a specific region part so that at least a specific recording medium passes in a fixing region of the pressure contact portion in the rotating axis direction of the heating roll.
    Type: Application
    Filed: December 3, 2009
    Publication date: September 30, 2010
    Inventors: Yasuki Tanaka, Yukihiro Ichiki, Satoshi Isahai, Masami Ishida, Masahiro Ishino, Hitoshi Nanba
  • Publication number: 20100247196
    Abstract: A recording medium transport mechanism including: a transporting device provided in a transport-path of medium, that transports the recording medium by a drive-roller and a facing-roller disposed to face the drive-roller; an urging member that urges the facing-roller toward the drive-roller; and a restricting portion that allows movement of the facing-roller away from the drive-roller against urging force of the urging member when the recording medium having thickness smaller than a predetermined thickness is transported in a region the drive-roller and the facing-roller facing each other, and restricts an allowable amount of movement of the facing-roller away from the drive-roller when the recording medium having thickness not smaller than the predetermined thickness is transported in the region compared to an allowable amount of movement of the facing-roller away from the drive-roller when the recording medium having thickness smaller than the predetermined thickness is transported is provided.
    Type: Application
    Filed: December 3, 2009
    Publication date: September 30, 2010
    Inventors: Yukihiro Ichiki, Yasuki Tanaka, Yoshiyasu Tanioka